Indicator



Patented Sept. l5, 1931 UNITED STATES PATENT OFFICE JESSE D. LANGDON, F LOS ANGELES, CALIFORNIA, SSIGNOR TO'LA'NGDON ENGINEER- ING CORPORATION, OF LOS ANGELES, CALIFORNIA a Y nrmca'ron applicati@ ma December 185, 19a?. smal No. 240,299.

The present invention relates to indicators and registers, and aims toprovidea novel and improved device for indicatingthe quantity of material delivered or other operations, and although the device is intended especially for use with a dispensing pump for indicating the quantity of grease, oil or other material dispensed, the device is useful for other purposes also to indicate quantity, operations, or the like. Y Y

Another object is the provision of novel fr means for operating an indicating member t sak by the reverse motions of the pump or other machine with which the device is used.

A further object is the'provision of an indicating device which may be conveniently assembled with a dispensingpump. Y

Still another object is the provisionofan.

indicator of the kindmentioned comprising a novel assembly of the component elements.

With the foregoing and other objects in view, which will be apparent as the description proceeds, the invention resides in the construction and arrangement of parts, as hereinafter described and claimed, it being understood that changes can be made within' the scope of what is claimed, without departing from the spirit of the invention.

yThe invention is illustrated in the accom-V Fig. 3 is a cross section on the line 3 3 of Fig.

or case having the back 7, sides 8 integral with the back, .and a removable frontor face plate 9 provided with bent back edges 10 to engage slidably behind the outturned flanges 11 at the forward edges of the sides 8.v The front plate 9 may be slid longitudinally intol and out of engagement with the sides 8 when assembling and separating the parts. guide 12 of U-shaped cross-section is fitted and secured within the case between-` the sides 8, with its edges extending rearwardly, as seen in Fig. 3. The guide is spaced .from the frontplate 9 to rprovide a slidewayfor the indicating member or slide 13. member 13 bears frictionally against the rear surface ofthe front plate 9, and saidfront plate has an opening 14 to expose thenumerals or other indicia printed, stamped or otherwise provided on the slide 13. The ends 15 of the slide are bent rearwardly to bear frictionally against the guide 12, in order that the slide 13 will remain in any position to which it is moved, said slide being dis, posed tightly between the front plate 9 and Y guide 12 but being free to `be forcibly moved.

wardly. Said Aplunger moves between the front plate 9 and guide 12 and is adapted to contact with the upper end of the slide 13, for pushing said slide downwardly to initial or starting position. The top or end 18 of the case is integral with the upper end of the lfront plate- 9, and has an upstanding flangel 20 to overlap the upper end of the back 7, said yHarige 20 and back being provided with apertures 21 adapted to register in order to receive a seal or lock to prevent the front plate 9 being moved open without breakingl the seal or opening the lock.

, j t A slide 21 is movable longitudinally in the Fig. 2 is a section on the line 2-2 of Fig. 1.

guide 12, and is reciprocated for advancing the indicating slide 13 step by step. The

Y t g Y slide 21 comprises a strip of sheet metal, and The indicator comprises an elongated shell has a spring pawl or dog 21a struck therefrom to spring forwardly and engage the ratchet teeth 16, thus providing a ratchet connection between the slides 13 and 21. The

vguide 12 has an opening 12a through which the pawl 21a is projectible when the slide 21 is moved upwardly, and when said slide moves downwardly the pawl 21a is retracted, as seen in Fig. 2. Thus, the upward movespring forwardly through the opening 12a SaidUA vment of the slide 21 permits the pawl 21a to i and to engage thecorresponding tooth-16, as y seen in dotted lines inkFig. 2, thereby moving theslide13 upwardly one stepwith the slide 21'. The return or downward movement of Y 1 the slide 21 will retract the pawl 21a, andthe slide 13 remains in its advanced position due to the frictional engagement of the slide 13 in its slideway."

Y wardly extending stop 24 bearing against the screw-threaded through the portion 23 and its adjustment is maintained'bymeans oteneer morelock nuts 26. v

das

25 of the slide' 21, whereby. atV the limits of. if

The means for impartingl'recip'rocatory moti'ontofthe slide 21 from'the'dispen'sing pump or other vmachine with which the indicator is used, comprises a. reciprocatory 4bar l position and iournalit zfor rot-ation in the' 27 slidable in the guide 12 behind'the slide'21. The bar 27 slides through albifurcationin the portion V2210i the slidev 21 and also slid-es in the guide 29 ofthe Acase which extends'below thefront plate 9. `The'bar4 27. has a .lie-ad or portionY 28 betweenlthe portion 22 and screw movement of the bar 27the'slide21is moved with said bar, the movement otthe Vslide 21 Vbeing relativelyV short while the Amovement of mt-he b'ar'27S, CODSldeIably 1911391" i' Tbilisi the bar 27 may haveva long stroke while the slides 13 andV 21 of the indicatorV ina-yl have short movements,'a`nd the full movement of the bar 27 is necessary to advanceV the indicating slide screw25 and raise the 'slide 21, soV astolift the slide 13 one step. The bar 27 must then move movement of the'ratchet slide 2.1,:whi`ch ad-l Y vances the indicating slide 13I'one step for f The dispensing each reciprocation, andthe full movementrof the'bar $27 is necessary lto actuate thef slides As shown, the

said bar has teeth 30,-van'd constitutes' a rack vhar meshing witha pinion 31jh'ous'ed within i a pocket .32, of the guide 29.Y 'lherotationcf back 7 of the casefand adaptedto contact with the top 18 `for limiting the upward-A movement of the slide 21. A Vscrew 25 isY '-13.V Thebar'27A must move to its upper' limit .in order that the head 28 will contact with the to itsv lower limit in order that'thehea'd 28- will seat on the portion 22 and movethe slide 21`downwardly, said slide 21 being held fric- 21 andVv 13, thereby-preventing falsefindica# tionsV and assuring of4 correct registration of. 'y vthe'material 'delivered or full operations pe-r- Vformed. i e Y the pinion 31 in reverse directions will reci'p 'roca'te' the rack bar 27 thereby aording con` fvenient connection ofthe deviceA with a disppensing pump@ l Y Y' ing screw or stop 36. Said'rack or plunger: K

is reciprocated by means of a pinion 37 se- Y cured on a shaiit 3S rotatable in a bearing'39.

nThe shaft 38Yhas a square or non-circular terminal 40 onwhich a crank l1 vissecured by means of a nut42 or otherwise, whereby the crank may be rotated in opposite directions for ejecting or dispensingthegrease,oil, or

.ether substance,as well known;

Inattaching thel present indicator to the I dispensing pump, the pinion 3l slips over the terminal 40 of the shaft 38, being provided Vwitli.a` square 'orinoncircular hole for that purpose, whereby the rack bar 27 is reciproircatedwith the racli'f or plunger 350i?V the pump. One side'o'f the pocket 32 has an opening )C3-to receive the hubor boss jof the pinion 31,V to ,hold said pinion in proper pocket 32.` The yopposite side oiY the pocket vlhas a larger openinglel throughY ii'hich the pinion may be l-moved, in Vas'se'mblingthe,

parts, and la washerorcover plate 45is dis-V posed across the opening'I el between the 3l so that itfmay be removed from thvejrack positions of the'lra'clr `'b'ar2a' and rack or Vplunger 35."

` 'A bendable-liange or Vplate v426"is-V'Ysecured` to the guide 29 and pocket 32 and is adapted v'tobe bent againstthe'bodyT`r of' the pump 33 ,or other suitable part in' order to `prevent thev indicator rfrom rotating'V with Vthe "shaft 38 or around'the axisvoi'said shaft.

With the device :assembled with vthe pump,

'fas shown and'describe'd', whenever the plunger 35 is given?one'fcempleteLV reciproc-ation,Y`

the indicating Slide'fcnmeinber 13 is advanced lone step, so that 'the'slide 13'will indicate, through the-opening' 14', the kquantity of 'n'iaterialdelivered` lf the plunger 15 is' notZ moved the Yfull amount, thenthe# crank '41 and/pocket 32to close said 4open#` Y ingandconcealthejpinion.` `Then the nut *42 and crank t1 areremoved, the indicator may be readily placedon or rren'i'oved from *theshaft 38`,"andthefplate 415k maybe re-1 m'oved, thereby Vgiving Aaccess to the'jpini'on Y slide 13 will not be advanced, therebyv pre-V venting cheating. When the desired. quanp Y Vtitv of material has been dispensed andthe n bar 27 is 'operably connected i' witha dispensing pump, and for this purpose plunger 35 `and rack'l bar ,'27v 'are moved plunger 17 downwardly.Y 'l`lii`s resets heindicator. j

Having thus described the"inveiitio'n,fwha

is claimed as new is'ze- Y 1. 'Anindicator comprising Y an"`elongated t cas-e, anindicating'v slide 'slidableflongitudi-Y I t pum`p133 is of anvlconven*KVV tional type,Y and hasajguide 34vin which the,` rack 35 ofa piston or 'plunger is'mov'able,

cooperable ratchet means lfor advancing the indicating slide step by step by the reciprocation of the second slide, and an actuating member entering the case and slidable longitudinally therein, the actuating member and second slide having cooperable portions adapted to contact at the limits of movement of the actuating member to reciprocate the second slide, the second slide having a short and the act-uating member having a long reciprocatory movement.

2. An indicator comprising an elongated case having a removable face plate, an indicator slide slidable longitudinally in said case behind said plate, said plate having an opening through which said slide is visible, a second slide also slidable longitudinally in the case, said slides having cooperable ratchet means for advancing the indicating slide step by step by the reciprocation of the second slide, and an actuating member entering the case and slidable longitudinally therein, the actuating member and second slide having cooperable portions adapted to contact at the limits of movement of the actuating member to reciprocate the second slide, the second slide having a short and the actuating member having a long reciprocatory movement.

3. An indicator comprising an elongated case, an indicating slide slidable longitudinally therein and having ratchet teeth, a second slide also slidable longitudinally in the case and having a paWl to engage said teeth for advancing the indicating slide step by step by the reciprocation of the second slide. an actuating member entering the case and slidable longitudinally therein, the actuating member and second slide having cooperable portions adapted to contact at the limits of movement of the actuating member to reciprocate the second slide, and means for disengaging said paivl from said ratchet teeth when the second slide is moved in a direction opposite to the advance movement of the indicating slide.

4. An indicator comprising an elongatedv case having a removable face plate, a removable longitudinal guide member in said case behind the face plate, an indicating slide slidable longitudinally in the case and guided by said member, a second slide slidable longitudinally in the case and guided by said member, said slides having cooperable ratchet means for advancing the indicating slide step by step by the reciprocation of the second slide, and an actuating member entering the case and slidable longitudinally therein, the actuating member and second slide having cooperable portions adapted to contact at the limits of movement of the actuating member to reciprocate the second slide, the second slide having a short and the actuating member having a long reciprocatory movement.

5. An indicator comprising an elongated case, a longitudinal guide member therein, an indicating slide slidable longitudinally in the case and uided by said member, a second slide slida le longitudinally in the case and guided by said member, the indicating slide having ratchet teeth, and the second slide having a spring pawl to engage said teeth for advancing the indicating slide step by step by the reciprocation of tlie second slide, said member having a portion for the contact of said paWl when the second slide is moved in a direction opposite to the advance movement of the indicating slide for disengaging said pawl from said teeth, and an actuating member entering the case and slidable longitudinally therein, the actuating member and second slide having cooperable portions ada ted to contact at the limits of movement o the actuating member to reciprocate the second slide.

6. In a meter for liquid dispensing apparatus having a piston for causing the discharge of a predetermined amount of liquid at each full stroke thereof, a sliding scale plate, a casing in which said scale is slidable, a vertical partition plate in said casing having a limited opening therein, a scale actuating plate slidable beside and parallel with said scale plate and adapted to be actuated only at the end of each full dispensing stroke of the piston, and a flexible tongue connected With said scalev actuating plate and projecting through the opening in said partition plate in position to actuate said scale and be released from the scale by said partition plate at the end of the return movement of the scale actuating plate.

7. In a meter for liquid dispensing ap aratus having a piston for causing the ischarge of a predetermined amount of liquid at each full stroke thereof, a sliding scale plate, a casing in which said scale is slidable, a vertical partition plate in said casing having a limited opening therein, a scale actuating plate slidable beside and parallel with said scale plate and adapted to be actuated only at the end of each full dispensing stroke of the piston, a flexible tongue connected with said scale actuating plate and projecting through the opening in said partition plate in position to actuate said scale and be released from the scale by said partition plate at the end of the return movement of the scale actuating plate, and means in said casing for frictionally egaging said scale to resist return movement after any operation thereof.

In testimony whereof I hereunto atiix my 

